US3906173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone line characteristic measuring instrument and display
Assignee: Individual
•
Filing: 1974-03-27
•
Granted: 1975-09-16
•
Expires: 1994-03-27
Abstract
Abstract There is disclosed a telephone line characteristic measuring instrument of the type described in my application Ser. No. 270,953, now U.S. Pat. No. 3,814,868, provided with an oscilloscope display. A signal representing the instantaneous inphase component of the total disturbance on a received test tone is applied to one set of deflection plates, and a signal representing the instantaneous quadrature component of the total disturbance on the received test tone is applied to the orthogonal deflection plates. The resulting display is a function of the disturbances only. Without requiring the use of a test modem, the oscilloscope trace identifies the source of a disturbance (e.g., amplitude modulation, phase modulation, phase hits, white noise, etc.), and in addition allows quantitative measurements to be taken from a graticule provided over the screen.
Inventors
- 👤 Frank R Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/46
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
110 words
A transmission path characteristic measuring instrument and display comprising means for processing a received signal having test tone and disturbance components therein to derive a first signal substantially representative of the instantaneous in-phase component of the total disturbance of interest on the received test tone and a second signal substantially representative of the instantaneous quadrature component of the total disturbance of interest on the received test tone, display means having first and second orthogonal input circuits responsive to the application of signals thereto for generating a display, and means for coupling each of said first and second signals to a respective one of said first and second orthogonal input circuits.
Claim 2
Dependent Claim
110 words
A transmission path characteristic measuring instrument and display comprising means for processing a received signal having test tone and disturbance components therein to derive a first signal substantially representative of the instantaneous in-phase component of the total disturbance of interest on the received test tone and a second signal substantially representative of the instantaneous quadrature component of the total disturbance of interest on the received test tone, display means having first and second orthogonal input circuits responsive to the application of signals thereto for generating a display, and means for coupling each of said first and second signals to a respective one of said first and second orthogonal input circuits.
Claim 3
Dependent Claim
35 words
A transmission path characteristic measuring instrument and display in accordance with claim 1 wherein said processing means is operative to eliminate substantially all of the test tone from each of said first and second signals.
Claim 4
Dependent Claim
45 words
A transmission path characteristic measuring instrument and display in accordance with claim 2 wherein said first signal includes two components, one representing the amplitude modulation of the received test tone and the other representing the instantaneous in-phase component of noise on the received test tone.
Claim 5
Dependent Claim
45 words
A transmission path characteristic measuring instrument and display in accordance with claim 3 wherein said second signal includes two components, one representing the phase modulation of the received test tone and the other representing the instantaneous quadrature component of noise on the received test tone.
Claim 6
Dependent Claim
76 words
A transmission path characteristic measuring instrument and display in accordance with claim 2 wherein each of said first and second signals includes two components, the first component in each of said signals representing a respective one of the amplitude modulation and the phase modulation of the received test tone, and the seconD component in each of said signals representing a respective one of the instantaneous in-phase and quadrature components of noise on the received test tone.
Claim 7
Dependent Claim
20 words
A transmission path characteristic measuring instrument and display in accordance with claim 5 wherein said display means is an oscilloscope.
Claim 8
Dependent Claim
38 words
A transmission path characteristic measuring instrument and display in accordance with claim 5 wherein said display means is an oscilloscope having a graticule on the face thereof with orthogonal axes marked to represent phase jitter and amplitude modulation.
Claim 9
Dependent Claim
24 words
A transmission path characteristic measuring instrument and display in accordance with claim 7 wherein said graticule further exhibits circles marked to represent disturbance levels.
Claim 10
Dependent Claim
34 words
A transmission path characteristic measuring instrument and display in accordance with claim 5 wherein said display means is an oscilloscope having a graticule on the face thereof with circles marked to represent disturbance levels.
Claim 11
Dependent Claim
76 words
A transmission path characteristic measuring instrument and display in accordance with claim 1 wherein each of said first and second signals includes two components, the first component in each of said signals representing a respective one of the amplitude modulation and the phase modulation of the received test tone, and the second component in each of said signals representing a respective one of the instantaneous in-phase and quadrature components of noise on the received test tone.
Claim 12
Dependent Claim
20 words
A transmission path characteristic measuring instrument and display in accordance with claim 10 wherein said display means is an oscilloscope.
Claim 13
Dependent Claim
35 words
A transmission path characteristic measuring instrument and display in accordance with claim 10 wherein said display means has a graticule on the face thereof with orthogonal axes marked to represent phase jitter and amplitude modulation.
Claim 14
Dependent Claim
24 words
A transmission path characteristic measuring instrument and display in accordance with claim 12 wherein said graticule further exhibits circles marked to represent disturbance levels.
Claim 15
Dependent Claim
34 words
A transmission path characteristic measuring instrument and display in accordance with claim 10 wherein said display means is an oscilloscope having a graticule on the face thereof with circles marked to represent disturbance levels.
Claim 16
Dependent Claim
29 words
A transmission path characteristic measuring instrument and display in accordance with claim 2 wherein said processing means derives said first and second signals scaled relative to said display means.
Claim 17
Dependent Claim
63 words
A transmission path characteristic measuring instrument and display in accordance with claim 15 wherein said display means is an oscilloscope having a graticule on the face thereof with orthogonal axes calibrated to represent phase jitter and amplitude modulation, said oscilloscope being calibrated so that a display formed thereby permits quantitative values of amplitude modulation and phase jitter to be read from said graticule.
Claim 18
Dependent Claim
24 words
A transmission path characteristic measuring instrument and display in accordance with claim 16 wherein said graticule further exhibits circles calibrated to represent disturbance levels.
Claim 19
Dependent Claim
34 words
A transmission path characteristic measuring instrument and display in accordance with claim 15 wherein said display means is an oscilloscope having a graticule on the face thereof with circles calibrated to represent disturbance levels.
Claim 20
Dependent Claim
29 words
A transmission path characteristic measuring instrument and display in accordance with claim 1 wherein said processing means derives said first and second signals scaled raltive to said display means.
Claim 21
Dependent Claim
76 words
A transmission path characteristic measuring instrument and display in accordance with claim 19 wherein each of said first and second signals includes two components, the first component in each of said signals representing a respective one of the amplitude modulation and the phase modulation of the received test tone, and the second component in each of said signals representing a respective one of the instantaneoUs in-phase and quadrature components of noise on the received test tone.
Claim 22
Dependent Claim
20 words
A transmission path characteristic measuring instrument and display in accordance with claim 20 wherein said display means is an oscilloscope.
Claim 23
Dependent Claim
61 words
A transmission path characteristic measuring instrument and display in accordance with claim 21 wherein said display means has a graticule on the face thereof with orthogonal axes marked to represent phase jitter and amplitude modulation, said display means being calibrated so that a display formed thereby permits quantitative values of amplitude modulation and phase jitter to be read from said graticule.
Claim 24
Dependent Claim
24 words
A transmission path characteristic measuring instrument and display in accordance with claim 22 wherein said graticule further exhibits circles calibrated to represent disturbance levels.
Claim 25
Dependent Claim
34 words
A transmission path characteristic measuring instrument and display in accordance with claim 20 wherein said display means is an oscilloscope having a graticule on the face thereof with circles calibrated to represent disturbance levels.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |